package com.fan.service.impl;

import com.fan.common.Const;
import com.fan.common.ServerResponse;
import com.fan.common.TokenCache;
import com.fan.dao.UserMapper;
import com.fan.pojo.User;
import com.fan.service.IUserService;
import com.fan.util.MD5Util;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.UUID;

/**
 * @author Kingdompin@163.com
 * @date 2018/2/6 上午9:43
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {

    @Autowired
    private UserMapper userMapper;

    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUsername(username);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("用户名不存在");
        }

        String md5Password = MD5Util.MD5EncodeUtf8(password);

        User user = userMapper.selectLogin(username, md5Password);
        if (user == null) {
            return ServerResponse.createByErrorMessage("密码错误");
        }

        user.setPassword(StringUtils.EMPTY);

        return ServerResponse.createBySuccess("登录成功", user);
    }

    @Override
    public ServerResponse<String> register(User user) {
        ServerResponse vaildResponse = this.checkVaild(user.getUsername(), Const.USERNAME);
        if (!vaildResponse.isSuccess()) {
            return vaildResponse;
        }
        vaildResponse = this.checkVaild(user.getEmail(), Const.EMAIL);
        if (!vaildResponse.isSuccess()) {
            return vaildResponse;
        }

        user.setRole(Const.Role.ROLE_CUSTOMER);
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));

        int resultCount = userMapper.insert(user);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("注册失败");

        }
        return ServerResponse.createBySuccessMessage("注册成功");
    }

    @Override
    public ServerResponse<String> checkVaild(String str, String type) {
        if (StringUtils.isNotBlank(type)) {
            if (Const.USERNAME.equals(type)) {
                int resultCount = userMapper.checkUsername(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("用户名已经存在");
                }
            }
            if (Const.EMAIL.equals(type)) {
                int resultCount = userMapper.checkEmail(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("邮箱已被注册");
                }
            }
        } else {
            return ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccessMessage("校验成功");
    }

    @Override
    public ServerResponse<String> selectQuestions(String username) {
        ServerResponse<String> vaildResponse = this.checkVaild(username, Const.USERNAME);
        if (vaildResponse.isSuccess()) {
            return ServerResponse.createByErrorMessage("用户名不存在");
        }
        String question = userMapper.selectQuestionByUsername(username);
        if (StringUtils.isNotBlank(question)) {
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码问题是空的");
    }

    @Override
    public ServerResponse<String> checkAnswer(String username, String question, String answer) {
        int resultCount = userMapper.checkAnswer(username, question, answer);
        if (resultCount > 0) {
            String forgetToken = UUID.randomUUID().toString();
            TokenCache.setKey(TokenCache.TOKEN_PREFIX + username, forgetToken);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题答案错误");
    }

    @Override
    public ServerResponse<String> forgetResetPassword(String username, String passwordNew, String token) {
        if(StringUtils.isBlank(token)){
            return ServerResponse.createByErrorMessage("参数错误，需要Token");
        }
        ServerResponse vaildResponse = this.checkVaild(username, Const.USERNAME);
        if(vaildResponse.isSuccess()){
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String forgetToken = TokenCache.getKey(TokenCache.TOKEN_PREFIX + username);
        if(StringUtils.isBlank(forgetToken)){
            return ServerResponse.createByErrorMessage("Token过期或不存在");
        }
        if(StringUtils.equals(token, forgetToken)){
            String md5Password = MD5Util.MD5EncodeUtf8(passwordNew);
            int resultCount = userMapper.updatePasswordByUsername(username, md5Password);
            if(resultCount >0){
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        }else {
            return ServerResponse.createByErrorMessage("Token错误，请重新获取Token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败") ;
    }

    @Override
    public ServerResponse<String> resetPassword(String passwordOld, String passwordNew, User user) {
        //user用来防止横向越权
        int resultCount = userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld), user.getId());
        if (resultCount == 0){
            return ServerResponse.createByErrorMessage("旧密码错误");
        }
        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount = userMapper.updateByPrimaryKeySelective(user);
        if(updateCount > 0){
            return ServerResponse.createBySuccessMessage("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");
    }

    @Override
    public ServerResponse<User> updateInfo(User user) {
        int resultCount = userMapper.checkEmailByUserId(user.getEmail(), user.getId());
        if(resultCount > 0 ){
            return ServerResponse.createByErrorMessage("email已存在，请更换邮箱");
        }
        User updateUser = new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());

        int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);
        if(updateCount > 0){
            return ServerResponse.createBySuccess("个人信息更新成功", updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }

    @Override
    public ServerResponse<User> getInfo(Integer id) {
        User user = userMapper.selectByPrimaryKey(id);
        if(user == null){
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }

    //backend

    /**
     * 校验是否是管理员
     * @param user
     * @return
     */
    @Override
    public ServerResponse checkAdminRole(User user) {
        if(user!=null && user.getRole().intValue() == Const.Role.ROLE_ADMIN){
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }
}
